The Pontyberem product became the youngest player to represent the Scarlets (17 years and 134 days) when he appeared in a pre-season friendly against Jersey in August 2015, making his Guinness Pro12 debut against Ulster the following month. A Wales U20s international at centre, Ioan can also operate on the wing and at full-back and reached 100 appearances for the Scarlets during the 2024-25 season.